328215663 has 6 divisors (see below), whose sum is σ = 474089304. Its totient is φ = 218810436.

The previous prime is 328215661. The next prime is 328215721. The reversal of 328215663 is 366512823.

It is a happy number.

It is not a de Polignac number, because 328215663 - 2¹ = 328215661 is a prime.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328215661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18234195 + ... + 18234212.

It is an arithmetic number, because the mean of its divisors is an integer number (79014884).

Almost surely, 2^328215663 is an apocalyptic number.

328215663 is a deficient number, since it is larger than the sum of its proper divisors (145873641).

328215663 is a wasteful number, since it uses less digits than its factorization.

328215663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36468413 (or 36468410 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 328215663 is about 18116.7232964463. The cubic root of 328215663 is about 689.7945639196.

The spelling of 328215663 in words is "three hundred twenty-eight million, two hundred fifteen thousand, six hundred sixty-three".